# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import asyncio

import click
import os
import uvloop


from aioservice.http import service

from laos.api.controllers import apps
from laos.api.controllers import routes
from laos.api.controllers import runnable
from laos.api.controllers import tasks

from laos.api.middleware import content_type
from laos.api.middleware import keystone

from laos.common import config
from laos.common import logger as log

from urllib import parse


class API(service.HTTPService):

    def __init__(self, host: str='0.0.0.0',
                 port: int=10001,
                 loop: asyncio.AbstractEventLoop=asyncio.get_event_loop(),
                 logger=None,
                 debug=False):

        v1_service = service.VersionedService(
            [
                apps.AppV1Controller,
                routes.AppRouteV1Controller,
                runnable.RunnableV1Controller,
                tasks.TasksV1Controller
            ], middleware=[
                keystone.auth_through_token,
                content_type.content_type_validator
            ])

        public_runnable_service = service.VersionedService(
            [
                runnable.PublicRunnableV1Controller
            ], middleware=[
                content_type.content_type_validator,
            ]
        )

        super(API, self).__init__(
            host=host,
            port=port,
            event_loop=loop,
            logger=logger,
            debug=debug,
            subservice_definitions=[
                v1_service, public_runnable_service
            ]
        )


@click.command(name='laos-api')
@click.option('--host',
              default=os.getenv("LAOS_HOST", '0.0.0.0'),
              help='API service host.')
@click.option('--port', default=int(os.getenv("LAOS_PORT", 10001)),
              help='API service port.')
@click.option('--db-uri',
              default=os.getenv(
                  "LAOS_DB",
                  'mysql://root:root@localhost/functions'),
              help='LaOS persistence storage URI.')
@click.option('--keystone-endpoint',
              default=os.getenv("KEYSTONE_ENDPOINT",
                                'http://localhost:5000/v3'),
              help='OpenStack Identity service endpoint.')
@click.option('--functions-url',
              default=os.getenv(
                  "FUNCTIONS_URL", 'http://localhost:8080/v1'),
              help='Functions API host')
@click.option('--log-level',
              default=os.getenv("LAOS_LOG_LEVEL", 'INFO'),
              help='Logging file')
@click.option('--log-file', default=os.getenv("LAOS_LOG_FILE"),
              help='Log file path')
@click.option('--debug', default=False, is_flag=True)
def server(host, port, db_uri,
           keystone_endpoint,
           functions_url,
           log_level,
           log_file,
           debug,
           ):
    """
    Starts an Project Laos API service
    """
    logger = log.UnifiedLogger(
        log_to_console=True if not log_file else False,
        filename=None if not log_file else log_file,
        level=log_level).setup_logger(__package__)

    asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
    loop = asyncio.get_event_loop()

    parts = parse.urlparse(functions_url)

    fnclient = config.FunctionsClient(
        parts.hostname,
        api_port=parts.port,
        api_protocol=parts.scheme,
        api_version=parts.path[1:]
    )
    loop.run_until_complete(fnclient.ping(loop=loop))
    connection_pool = config.Connection(db_uri, loop=loop)

    config.Config(
        auth_url=keystone_endpoint,
        functions_client=fnclient,
        logger=logger,
        connection=connection_pool,
        event_loop=loop,
    )

    API(
        host=host, port=port, loop=loop,
        logger=logger, debug=debug
    ).apply_swagger(
        swagger_url="/api",
        description="Laos API service docs",
        api_version="v1.0.0",
        title="Laos API",
    ).initialize()


if __name__ == "__main__":
    server()